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LM2574N-12

Name: LM2574N-12
Rating: 4.7 (12 reviews)

IC REG BUCK 12V 500MA 8PDIP

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資料表 LM2574N-12 DataSheet
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規格

Series	SIMPLE SWITCHER®
Part Status	Obsolete
Function	Step-Down
Output Configuration	Positive
Topology	Buck
Output Type	Fixed
Number of Outputs	1
Voltage - Input (Min)	4V
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	12V
Current - Output	500mA
Frequency - Switching	52kHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Base Product Number	LM2574

概述

Description

The LM2574N-12 is a high-efficiency, step-down (buck) voltage regulator designed for DC-DC conversion applications. Specifically, it provides a fixed output voltage of 12V with a maximum output current of 1A. This integrated circuit is part of the LM2574 series, which features a simple design with minimal external components required, making it ideal for various applications, including power supplies for consumer electronics, automotive systems, and battery chargers.
Key features of the LM2574N-12 include:
- Wide input voltage range (usually 7V to 40V).
- High efficiency (up to 75% or more).
- Built-in overcurrent and thermal protection to ensure reliability.
- Adjustable frequency (typically 52kHz) for reducing switching losses.
Its compact packaging and ease of implementation make it a popular choice among engineers seeking to achieve efficient power management solutions. Overall, the LM2574N-12 is a versatile and reliable option for users needing a straightforward buck converter.

Features

The LM2574N-12 is a high-efficiency step-down (buck) voltage regulator designed for a wide range of applications. Key features include:
1. Input Voltage Range: Accepts input voltages from 7V to 40V.
2. Output Voltage: Fixed output voltage of 12V.
3. Output Current: Capable of delivering up to 1A of continuous output current.
4. Efficiency: High efficiency, often over 80%, reducing heat generation.
5. Integrated Switch: Includes a high-performance internal power switch, minimizing external component count.
6. Protection Features: Built-in thermal shutdown and current limiting for enhanced reliability.
7. Operating Frequency: Typically operates at 52 kHz, allowing the use of smaller inductors and capacitors.
8. Package Options: Available in a 5-pin TO-220 package, facilitating easy heat dissipation.
These features make the LM2574N-12 suitable for applications such as battery chargers, power supplies, and other DC-DC conversion projects.

Package

The LM2574N-12 is typically packaged in a TO-220 or a DIP-8 (Dual In-line Package) configuration. The TO-220 package is often used for applications requiring better thermal performance, while the DIP-8 is suitable for space-constrained designs.

Pinout

The LM2574N-12 is a step-down (buck) voltage regulator with a total of 5 pins. Below are the pin functions:
1. Pin 1 (Vin): Input voltage supply. Connects to the input voltage source.
2. Pin 2 (GND): Ground. This pin is connected to the system ground.
3. Pin 3 (Vout): Output voltage. Provides a regulated output voltage (12V in this case).
4. Pin 4 (SW): Switch. Connects to the inductor and is used for switching the output voltage.
5. Pin 5 (Feedback): Feedback. This pin is connected to a resistor divider from the output to regulate the output voltage.
The LM2574N-12 is designed for applications requiring a regulated 12V output with a maximum output current of 1A. It includes features like thermal shutdown and current limiting for protection.

Manufacturer

The LM2574N-12 is manufactured by Texas Instruments (TI), a leading global semiconductor company. Texas Instruments designs and produces a wide range of electronics components, including analog chips, embedded processors, and digital signal processors. Founded in 1930, TI serves various industries, including automotive, industrial, communications, and consumer electronics. The company is known for its innovation in analog and embedded processing technologies and plays a significant role in advancing electronic systems through its extensive portfolio of products. TI's commitment to research and development has established it as a prominent player in the semiconductor market.

Application

The LM2574N-12 is a step-down (buck) voltage regulator commonly used in applications such as battery-powered devices, automotive power supplies, industrial equipment, and consumer electronics. It efficiently converts higher input voltages to a stable 12V output, making it suitable for powering microcontrollers, sensors, and communication devices. Its features include low noise, overcurrent protection, and ease of integration into circuits.

Equivalent

Equivalent products to the LM2574N-12 include the LM2574-12, LM2576-12, and LM2575-12. Additionally, you can consider the MIC2940, L78S12, and LM317 for similar voltage regulation functions, depending on your specific requirements for current output and features. Always check the datasheets for compatibility in your application.